Senior Java Software Engineer

Oliver Bernard; Greater London; Hybrid; Full time

Benefits offered by this job

Meaningful product ownership

Modern tech stack

Collaborative team environment

Flexible working hours

Job summary

A leading software development company in London is seeking a Senior Java/Kotlin Engineer to join their high-impact product engineering team. In this hybrid role, you will design scalable backend services and influence technical direction. Ideal candidates will have extensive experience with Java/Kotlin, AWS, and distributed systems. You will benefit from a collaborative culture, flexible hours, and strong work-life balance, while contributing to impactful customer-facing products.

Qualifications

• Strong professional experience with Java and/or Kotlin.
• Proven track record building and shipping customer-facing products.
• Deep experience with Apache Kafka/event streaming architectures.

Responsibilities

• Designing and building high-scale backend services in Java and Kotlin.
• Building and operating systems on AWS cloud infrastructure.
• Mentoring engineers and contributing to a strong engineering culture.

Skills

Java

Kotlin

AWS

Apache Kafka

microservices

system design

mentoring

Tools

Terraform

CloudFormation

Kubernetes

Job description

Hybrid – London (3 days onsite / 2 days WFH)

About the role

We’re looking for a Senior Java/Kotlin Engineer who loves building real products used by real customers. You’ll join a high-impact product engineering team designing and delivering scalable, event-driven systems in the cloud.

This is a hands-on senior role for someone who thrives on ownership, enjoys solving complex problems, and wants to shape both technical direction and product outcomes.

What you’ll be doing

• Designing and building high-scale backend services in Java and Kotlin
• Building and operating systems on AWS cloud infrastructure
• Working closely with Product, Design, and Data teams to deliver customer-facing features
• Driving technical architecture, engineering standards, and best practices
• Mentoring engineers and contributing to a strong engineering culture
• Improving performance, reliability, and observability of distributed systems
• Strong professional experience with Java and/or Kotlin
• Proven track record building and shipping customer-facing products
• Deep experience with Apache Kafka / event streaming architectures
• Production experience with AWS (e.g. ECS/EKS, Lambda, S3, RDS, DynamoDB, etc.)
• Experience designing microservices and distributed systems
• Strong knowledge of system design, scalability, and resilience
• Experience working in cross-functional product teams
• Excellent communication and mentoring skills

Nice to have

• Infrastructure as Code (Terraform / CloudFormation)
• Kubernetes or container orchestration
• CI/CD and DevOps practices
• Experience in high-growth or scale-up environments

Working setup

• Hybrid: 3 days per week in our London office
• 2 days work from home
• Flexible working hours and strong work-life balance culture

What you’ll get

• Meaningful product ownership and impact
• Modern tech stack and strong engineering culture
• Collaborative, supportive team environment
• Opportunity to shape architecture and technical direction